The Broadcom® ACPL-C87B/C87A/C870 voltage sensors
are optical isolation amplifiers designed specifically for
voltage sensing. Its 2V input range and high 1-GΩ input
impedance, makes it well suited for isolated voltage sensing
requirements in electronic power converters applications,
including motor drives and renewable energy systems. In a
typical voltage sensing implementation, a resistive voltage
divider is used to scale the DC-link voltage to suit the input
range of the voltage sensor. A differential output voltage that
is proportional to the input voltage is created on the other
side of the optical isolation barrier.